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Most likely you're going to put in standard outlets. They are 15A outlets that can handle 20A circuits and 12ga wire. An actual 20A outlet has one of the prongs in the T formation, so it can take a 20A plug which has one prong sideways. There are very few things that actually use this plug, and if you had one such thing, it would most likely be best on a dedicated circuit anyways.

So... the 15A plugs (two parallel prongs and ground) that can handle 20A circuits are the standard plug and what I'd use...

{Edit}
Switches... If you're on a 20A circuit and switching the outlets on/off, then Leviton makes a 20A switch. It's like $3, not expensive.